Properties

customData

language

Language tag as per RFC 5646 (If subtype is “SUBTITLES” it is mandatory).

name

(non-null string or undefined)

A descriptive, human readable name for the track. For example "Spanish".

subtype

(non-null string or undefined)

For text tracks, the type of text track.

trackContentId

(non-null string or undefined)

It can be the url of the track or any other identifier that allows the receiver to find the content (when the track is not inband or included in the manifest). For example it can be the url of a vtt file.

trackContentType

It represents the MIME type of the track content. For example if the track is a vtt file it will be ‘text/vtt’. This field is needed for out of band tracks, so it is usually provided if a trackContentId has also been provided. It is not
mandatory if the receiver has a way to identify the content from the trackContentId, but recommended. The track content type, if provided, must be consistent with the track type.

trackId

number

Unique identifier of the track within the context of a MediaInformation object.